meshkernel::TriangulationInterpolation Class Reference

A class used for triangulation interpolation. More...

#include <TriangulationInterpolation.hpp>

Public Member Functions
	TriangulationInterpolation (const std::vector< Point > &locations, const std::vector< Sample > &samples, Projection projection)
	Constructor. More...
void	Compute ()
	Compute results on the interpolation points.
const auto &	GetResults () const
	Get the results. More...

Detailed Description

A class used for triangulation interpolation.

As for averaging, the triangle interpolation operates at three specific Location - Faces, Nodes, and Edges. Only the values at the nodes of the identified triangle are used in the computation of each location. The algorithm operates as follow:

• The triangulation of the samples is computed
• For each triangle, the circumcenter is computed
• The triangle circumcenters are ordered in an RTree for a fast search
• For each location, the closest circumcenter is found
• If the corresponding triangle contains the location then the linear interpolation is performed, otherwise, the next neighbouring triangle is searched. The next neighbouring triangle is the first triangle that satisfies these two conditions:
  1. shares one of the current triangle edges.
  2. the crossing of the edge and the line connecting the location the current triangle circumcenter exists.
• If the next triangle does not contain the location, repeat the step above for a maximum number of times equal to two times the number of triangles.

When a triangle enclosing a specific location is not found, the interpolated value at that location is invalid. The handling of spherical accurate projection occurs at low-level geometrical functions (IsPointInPolygonNodes, AreSegmentsCrossing). Therefore, the algorithm is independent of the implementation details that occur at the level of the geometrical functions.

Constructor & Destructor Documentation

TriangulationInterpolation()

meshkernel::TriangulationInterpolation::TriangulationInterpolation	(	const std::vector< Point > &	locations,
		const std::vector< Sample > &	samples,
		Projection	projection
	)

Constructor.

Parameters

[in]	locations	Locations the values should be computed
[in]	samples	Values to use for the interpolation
[in]	projection	Projection to use

Member Function Documentation

GetResults()

const auto& meshkernel::TriangulationInterpolation::GetResults ( ) const

inline

Get the results.

Returns

The vector with results

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The documentation for this class was generated from the following file:

• /home/runner/work/MeshKernel/MeshKernel/libs/MeshKernel/include/MeshKernel/TriangulationInterpolation.hpp